Question: limit of multivariate function from different directions


I am having trouble with the syntax for entering a limit of a multivariate function with direction specifiers.

For a single variate function f(x) the limit for x -> a from the right is specified by


A limit of a multivariate function f(x,y) for x -> a and y -> b can be entered by


However I do not know how to specify directions in this case. Say, I want x to approach a from the right, and y to approach b from the left. What is the syntax to do this?





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